Appendix 7. Biological Resources Contents

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Appendix 7. Biological Resources Contents Devers–Palo Verde No. 2 Transmission Line Project APPENDIX 7 – CONTENTS Appendix 7. Biological Resources Contents This appendix includes the following sections: Appendix 7-1: Special Status Species Accounts (Arizona) Appendix 7-2: Special Status Species Accounts (California) Appendix 7-3: Table of Sensitive Plants Species with a Low Potential to Occur Appendix 7-4: Sensitive Plant Species Accounts Appendix 7-5: Table of Sensitive Wildlife Species with a Low Potential to Occur Appendix 7-6: Sensitive Wildlife Species Accounts October 2006 Ap.7-i Final EIR/EIS Devers–Palo Verde No. 2 Transmission Line Project APPENDIX 7 – CONTENTS Appendix 7-1 Special Status Species (Arizona ) Invertebrates Cheese-weed moth lacewing (Oliarces clara). The cheese-weed moth lacewing is a Neuropteran that is only known from 10 isolated populations in the Colorado River drainage, including southwestern Ari- zona, southern California, and Clark County, Nevada. This species occurs at elevations from sea level to 328 feet above msl on or near bajadas. It is usually associated with creosotebush since the larvae feed from the roots of this plant, and adults typically gather at the higher topographic features in the area to mate. The Proposed Project route is within the elevation range for this species and the creosotebush is dominant along the route; therefore, suitable habitat for this species is present along the proposed route (AGFD 2003). The two known locations of this species in Arizona are from the Gila Mountains and Telegraph Pass just east of Yuma in southwestern Arizona (BOR, 1997). Although these known loca- tions of this species are approximately 60 miles south of the Proposed Project, suitable habitat for this species is present along the route and few records of this species exist. Fish Razorback Sucker (Xyrauchen texanus). The razorback sucker is endemic to the large rivers of the Colorado River Basin from Wyoming to Mexico. It was extirpated from much of its historic range because of the habitat alteration resulting from the construction of numerous dams and the introduction of aggressive non-native fish species. Remnant populations are still present in the upper portion of this species range in the Green, Yampa, Colorado, and San Juan Rivers. In Arizona, razorback suckers his- torically occurred in the Colorado, San Pedro, Verde, Gila, and Salt Rivers. Though numerous Arizona stocking efforts have taken place in the past 30 years, this species primarily occurs only in Lake Mohave, Lake Mead, Lake Havasu, and adjacent waters below Havasu along the lower Colorado River. The preferred habitat of these fish is slow backwaters of medium- and large-sized rivers with optimum water temperatures of 71 to 77 degrees Fahrenheit. Elevations of suitable habitat include low and inter- mediate elevations and these fish do not occur in high elevation creeks or rivers (AGFD, 2002). The Proposed Project route is within the known geographical range for this species and aquatic habitats are present along the route; therefore suitable habitat for this species is present along the proposed route. According to the AGFD HDMS, a recorded location of this species occurs within three miles of the Proposed Project, plus designated critical habitat for this species is present along the Colorado River along the Proposed Project route. Thus, since a known location of this species is present along the Pro- posed Project route and suitable habitat for this species is present, it is highly likely that the razorback sucker is present along the route and within the vicinity along the Colorado River. Amphibians and Reptiles Sonoran Desert tortoise (Gopherus agassizii [Sonoran population]). The desert tortoise can be found from northern Sinaloa, north to southern Nevada and southwestern Utah, and from south central California, east to southeastern Arizona. The Sonoran population of the desert tortoise includes those tortoises south and east of the Colorado River. Habitat for this species occurs primarily in the hills and rocky mountainous terrain of Sonoran Desertscrub vegetation communities, including Arizona Upland and Lower Colorado River Valley subdivisions. Desert tortoises are typically found along washes and rocky areas, building their shelter sites in rocky areas or in caliche caves along washes. They may also be found in areas where there is creosotebush, since they have been known to burrow under these shrubs. The ele- vational range of the Sonoran population of the desert tortoise is from 510 to 5,300 feet above msl October 2006 Ap.7-1 Final EIR/EIS Devers–Palo Verde No. 2 Transmission Line Project APPENDIX 7. BIOLOGICAL RESOURCES (AGFD, 2001). The Proposed Project is within the elevation range for this species and desert scrub vegetation are present along the route; therefore, suitable habitat for this species is present along the Proposed Project route. According to the AGFD HDMS, there are numerous recorded locations of the Sonoran desert tortoise within Maricopa and La Paz Counties. Additionally, 11 of these locations occur within three miles of the Proposed Project route and a juvenile tortoise was encountered by biologists while surveying the route. Since these known locations are in very close proximity of the Proposed Project, an individual was observed within the route, and suitable habitat for this species is present, it is highly likely that the Sonoran desert tortoise is present along the route and within the vicinity. Mojave fringe-toed lizard (Uma scoparia). The Mohave fringe-toed lizard occupies habitats with fine sand and dunes, flats, riverbanks, and washes of arid deserts. These areas generally contain low- growing vegetation and are within the creosotebush desert habitat. This species is known to occur in the Mojave Desert in California, southeast to just over the Arizona state line. The elevational range of this species is from 510 to 1,090 feet above msl in Arizona (AGFD, 2003). The Proposed Project is within the elevation range for this species and sandy areas are present along the route; therefore, suitable habi- tat for this species is present along the Proposed Project route. The closest known locations of this species to the Proposed Project, according to the AGFD HDMS, are (1) several near Parker and Bouse Wash, approximately 25 miles north of the Proposed Project route, and (2) the La Posa Plain, approxi- mately 10 miles south of the Proposed Project route. Since one of these known locations is in close proximity of the Proposed Project and suitable habitat for this species is present, it is likely that the Mohave fringe-toed lizard is present along the route and within the vicinity. Common chuckwalla (Sauromalus obesus [ater]). The common chuckwalla is a large herbivorous lizard species that occupies old lava flows, rocky hillsides, and rock outcrops in Sonoran and Mohave Desertscrub. The elevational range of this species is from sea level to 6,000 feet above msl. The geographical range of the chuckwalla is in the Sonoran and Mohave Deserts from southern California, southern Nevada, and western Arizona, to Baja, Mexico (Stebbins, 2003). The Proposed Project is within the elevation range for this species and the rocky areas are present along the proposed route; therefore, suitable habitat for this species is present within the proposed route (AGFD, 2005). The closest known locations of this species to the Proposed Project, according to the AGFD HDMS, are (1) from southwestern Arizona, approximately 70 miles south of the Proposed Project route, and (2) near Gila Bend, Arizona, approximately 25 miles east of the Proposed Project route. Although these known locations of this species are not within the immediate vicinity of the Proposed Project, suitable habitat for this species is present along the route and the species is likely to occur within the vicinity. Banded Gila monster (Heloderma suspectum cinctum). The banded Gila monster is a large, venom- ous lizard species that is found primarily in northwestern Arizona, but adjacent isolated populations are located in Utah, Nevada, and California. They have also been found in western Arizona within northwest Maricopa County and southwestern Yavapai County. Habitat for the banded Gila monster includes undu- lating rocky foothills, bajadas, and canyons. However, they can also be found in open, sandy areas. The elevational range of this species is from sea level to 5,000 feet above msl (AGFD, 2002). The Proposed Project is within the elevation range for this species and rocky areas are present along the proposed route; therefore, suitable habitat for this species is present along the route. The closest known locations of this species to the Proposed Project, according to the AGFD HDMS, are (1) from the Livingston Hills within the Kofa NWR, within three miles of the Proposed Project, and (2) near the intersection of I-10 and Highway 60, approximately 10 miles north of the Proposed Project route. Since these known locations are in close proximity of the Proposed Project and suitable habitat for this species is present, it is likely that the banded Gila monster is present along the route and within the vicinity. Final EIR/EIS Ap.7-2 October 2006 Devers–Palo Verde No. 2 Transmission Line Project APPENDIX 7. BIOLOGICAL RESOURCES Desert rosy boa (Charina trivirgata gracia). The desert rosy boa is only one of two boa species that occur in the U.S. Rosy boas prefer rocky shrublands and deserts habitats. They are also attracted to oases and streams, but do not require permanent water sources (Stebbins, 2003). The elevational range of this species is from sea level to 5,500 feet above msl. The geographical range of the desert rosy boa is from the Mohave Desert and Colorado Desert of central southern California, east to the Basin Ranges of western Arizona (AGFD, 2003). The Proposed Project is within the elevation range for this species and desert areas are present along the proposed route; therefore, suitable habitat for this species is pre- sent along the proposed route.
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